2lS 



SAXIl-RAGACl'.AE. 



Vol. II. 



I. Micranthes nivalis (L.) Small. Clustered Alpine 

 Sa.xifrage. l'"ig. 2156. 



Sa.vifraga tiivcilis L. Sp. IM. 401. 1753. 



Micranthes nivalis Small, N. A. Flora 22'-': i,i6. 1905. 



Seldom over 6' high. Scape viscid, naked, or braclcd at 

 the base of the capitate sometimes branched inflorescence ; 

 leaves ovate or oval, narrovvfed into a margined petiole, 

 thick; flowers white, 3"-5" broad, in a compact cluster; 

 calyx-lobes ovate or oblong, spreading, obtuse, about one- 

 half the length of the oblong or oblong-ovate petals; ovary 

 half-inferior; follicles deep purple, divergent. 



Labrador and arctic America, south in the Rocky Mountains 

 to Arizona. Also in- northern and alpine Europe and Siberia. 

 Summer. Said to flower beneath the snow. 



2. Micranthes texana (Biickl.) Smal 

 Saxifrage. Fig. 2157. 



Texan 



Sa.vifraga texana Buckl. Proc. Acad. Phila. 1861 ; 455. 



1862. 

 Micranllies texana Small, Fl. SE. U. S. ,501. 1903. 



Scape sparingly pubescent up to the inflorescence, 

 2'-/' high. Leaves ovate to obovate, narrowed into 

 broad petioles, entire or shallowly toothed, V-zV long; 

 inflorescence with the branches ending in congested 

 cymules; flowers white, regular, 2"-3" broad; calyx- 

 lobes erect, broadly oblong to ovate, somewhat shorter 

 than the suborbicular or obovate petals ; follicles erect 

 or nearly so. 



On hillsides or in sandy barrens, Missouri and Texas. ^ 

 March-April. 



3. Micranthes virginiensis (Michx.) Small. Early Saxifrage. Fig. 2158. 



Saxifraga virginiensis Michx. FI. Bor. Am. I : 260. 



1803. 

 Micranllies virginiensis Small. Fl. SE. U. S. 501. 



1903. 



Scape viscid-pubescent, 4'-i2' high, naked, or 



with a few bracts at the base of the pedicels. 



Leaves obovate, or oval with a spatulate base, 



narrowed into a margined petiole, dentate or 



crenate, obtuse or acutish at the apex, 1-3' 



long or longer ; inflorescence cymose, at length 



loose and paniculate with the lower peduncles 



elongated ; flowers white, regular, 2"-3" broad ; 



calyx-lobes erect, triangular or triangular-ovate, 



much shorter than the oblong-spatulate, obtuse 



petals ; ovary nearly free from the calyx ; carpels 



nearly separate, the follicles at length widely 



divergent. 



In dry or rocky woodlands. New Brunswick to 

 Minnesota, south to Georgia and Tennessee. As- 

 cends to 3500 ft. in Virginia. March-May. Forms 

 with 15 stamens occur on New York Island, and 

 with green petals in Essex Co.. Mass. Spring-saxi- 

 frage. May-flower. Sweet wilson. Everlasting. 



